Design criteria for flexible safety barriers used in industrial laser environments

The requirements of ANSI Z136.1 (Sec. 4.6.4) specifies that a blocking barrier, which can block or filter the laser beam at the entryway should be used inside the controlled area to prevent the laser light from exiting the area at levels above the applicable MPE level. This article examines methods of installation and design of these laser barriers, including screens and curtains. The concept of when to use a ceiling mounted barrier versus a floor frame barrier as well as the benefits and drawbacks of each design is also discussed in this paper. Testing criteria is also addressed in terms of damage threshold of the barrier material itself as well as a review of how and when to incorporate specific window filter material. Specific labeling, indicating the damage threshold levels are also addressed. Other requirements for laser safety barriers will also be discussed such as materials used in the manufacture of laser barriers. The Z136.1 mentions (Appendix C2.4), “Important is the factor that decomposition products resulting from the laser interaction not be a respirable hazard. Material safety data sheets are also discussed as well as testing methods to determine respirable hazards.